What does Romans 9 teach about free will?

In Romans 9, the Apostle Paul explicitly addresses the concept of free will in relation to salvation. Verse 16 states, 'So then, it is not of him that willeth, nor of him that runneth, but of God that showeth mercy.' This indicates that human will plays no part in God's decision to grant mercy. The sovereignty of God dictates that He alone decides whom He will save. This is a profound truth within sovereign grace theology, emphasizing that our actions cannot earn or influence our salvation; it is a direct result of God's grace and purpose, highlighting His ultimate authority over all aspects of life.